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  • Received: Aug. 1, 2020

    Accepted: Oct. 26, 2020

    Posted: Jan. 5, 2021

    Published Online: Jan. 5, 2021

    The Author Email: Ioan Dancus (ioan.dancus@eli-np.ro)

    DOI: 10.1017/hpl.2020.41

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    François Lureau, Guillaume Matras, Olivier Chalus, Christophe Derycke, Thomas Morbieu, Christophe Radier, Olivier Casagrande, Sébastien Laux, Sandrine Ricaud, Gilles Rey, Alain Pellegrina, Caroline Richard, Laurent Boudjemaa, Christophe Simon-Boisson, Andrei Baleanu, Romeo Banici, Andrei Gradinariu, Constantin Caldararu, Bertrand De Boisdeffre, Petru Ghenuche, Andrei Naziru, Georgios Kolliopoulos, Liviu Neagu, Razvan Dabu, Ioan Dancus, Daniel Ursescu. High-energy hybrid femtosecond laser system demonstrating 2 × 10 PW capability[J]. High Power Laser Science and Engineering, 2020, 8(4): 04000e43

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Block diagram of FE and one amplification arm with the three corresponding outputs: 100 TW at 10 Hz, 1 PW at 1 Hz, and 10 PW at 1 shot/min repetition rate.

Fig. 1. Block diagram of FE and one amplification arm with the three corresponding outputs: 100 TW at 10 Hz, 1 PW at 1 Hz, and 10 PW at 1 shot/min repetition rate.

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Venteon oscillator spectrum.

Fig. 2. Venteon oscillator spectrum.

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CPA1 and XPW spectra.

Fig. 3. CPA1 and XPW spectra.

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Near-field spatial intensity profile of the picosecond pulses: (a) before beam shaping device; (b) after beam shaping device.

Fig. 4. Near-field spatial intensity profile of the picosecond pulses: (a) before beam shaping device; (b) after beam shaping device.

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Near-field beam intensity profile of the 532 nm picosecond pump laser for OPCPA.

Fig. 5. Near-field beam intensity profile of the 532 nm picosecond pump laser for OPCPA.

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Evolution of the 800 nm broadband beam spatial intensity profile through the FE. The FE near-field intensity and far-field intensity profiles were measured at the output of the second OPCPA stage.

Fig. 6. Evolution of the 800 nm broadband beam spatial intensity profile through the FE. The FE near-field intensity and far-field intensity profiles were measured at the output of the second OPCPA stage.

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Stability of the OPCPA spectrum over 7 h continuous operation. The red curve is the average of the data acquired at 10 min intervals that we represented by the gray curves.

Fig. 7. Stability of the OPCPA spectrum over 7 h continuous operation. The red curve is the average of the data acquired at 10 min intervals that we represented by the gray curves.

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FE contrast assessment. By blocking the device input, the limitation of the measurement device sensitivity has been evaluated in the range of 10–13.

Fig. 8. FE contrast assessment. By blocking the device input, the limitation of the measurement device sensitivity has been evaluated in the range of 10–13.

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The typical beam profile of the pump lasers.

Fig. 9. The typical beam profile of the pump lasers.

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Pulse temporal profile of the ATLAS 100 laser, 50 ns/div; delay between laser pulses was set at 50 ns; the entire FWHM pulse duration, for combined pulses, is about 70 ns.

Fig. 10. Pulse temporal profile of the ATLAS 100 laser, 50 ns/div; delay between laser pulses was set at 50 ns; the entire FWHM pulse duration, for combined pulses, is about 70 ns.

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The beam profile at the output of each main amplifier.

Fig. 11. The beam profile at the output of each main amplifier.

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Schematic configuration of the high-energy Ti:sapphire amplification arm.

Fig. 12. Schematic configuration of the high-energy Ti:sapphire amplification arm.

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Spectral bandwidth management through the high-energy Ti:sapphire amplifiers: (a) typical reflectivity and dispersion of the spectral filters at 45° angle of incidence; (b) simulation of 100 μJ energy, Gaussian spectrum seed pulse (blue line) propagation through five chirped pulse amplifiers to reach 90 J output pulse energy, with spectral shaping mirrors (gray line) and without spectral shaping mirrors (red line).

Fig. 13. Spectral bandwidth management through the high-energy Ti:sapphire amplifiers: (a) typical reflectivity and dispersion of the spectral filters at 45° angle of incidence; (b) simulation of 100 μJ energy, Gaussian spectrum seed pulse (blue line) propagation through five chirped pulse amplifiers to reach 90 J output pulse energy, with spectral shaping mirrors (gray line) and without spectral shaping mirrors (red line).

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Evolution of the spectrum through the high-power Ti:sapphire amplifiers

Fig. 14. Evolution of the spectrum through the high-power Ti:sapphire amplifiers

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The HPLS 10 PW compressor and diagnostics diagram; the inset is a picture of one of the two ELI-NP 10 PW compressors using the meter size gratings. D.M., deformable mirror; WFS, wavefront sensor; CCD-NF, near-field CCD; CCD-FF, far-field CCD; AUTO-CO, single-shot autocorrelator; CROSS-CO, third-order cross-correlator.

Fig. 15. The HPLS 10 PW compressor and diagnostics diagram; the inset is a picture of one of the two ELI-NP 10 PW compressors using the meter size gratings. D.M., deformable mirror; WFS, wavefront sensor; CCD-NF, near-field CCD; CCD-FF, far-field CCD; AUTO-CO, single-shot autocorrelator; CROSS-CO, third-order cross-correlator.

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Extraction efficiency for the 10 PW level amplifier AMP3.2.

Fig. 16. Extraction efficiency for the 10 PW level amplifier AMP3.2.

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Wizzler measurements: (a) flat spectral phase and more than 70 nm spectral bandwidth; (b) reconstructed pulse with τ = 22.7 FWHM duration.

Fig. 17. Wizzler measurements: (a) flat spectral phase and more than 70 nm spectral bandwidth; (b) reconstructed pulse with τ = 22.7 FWHM duration.

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Contrast measurements at the output of the HPLS for the different amplification levels.

Fig. 18. Contrast measurements at the output of the HPLS for the different amplification levels.

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Measured data from the wavefront sensor and far-field camera on the 10 PW diagnostic bench. The wavefront map shows a wavefront error of 0.05 μm RMS. The calculated PSF from the measured irradiance map and wavefront map shows an SR of 0.9. Far-field profile confirms the good focusability of the beam.

Fig. 19. Measured data from the wavefront sensor and far-field camera on the 10 PW diagnostic bench. The wavefront map shows a wavefront error of 0.05 μm RMS. The calculated PSF from the measured irradiance map and wavefront map shows an SR of 0.9. Far-field profile confirms the good focusability of the beam.

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Long-term stability test for the 1 PW level amplifier during 1 day of operation showing the energy of all the shots before compression.

Fig. 20. Long-term stability test for the 1 PW level amplifier during 1 day of operation showing the energy of all the shots before compression.

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